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Mathematics
Real Numbers
858+ practice questions available
Sample Practice Questions
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1
Medium
Two numbers are in the ratio 2:3 and their HCF is 18. The numbers are:
A36 and 54
B24 and 36
C18 and 27
D12 and 18
2
Medium
The LCM of 2² × 3³ and 2⁴ × 3 is:
A2² × 3
B2⁴ × 3³
C2⁶ × 3⁴
D2² × 3³
3
Easy
Assertion (A): If \(HCF(a, b) = 5\) and \(LCM(a, b) = 200\), then \(a \times b = 1000\). Reason (R): For any two positive integers \(a\) and \(b\), \(HCF(a, b) \times LCM(a, b) = a \times b\).
ABoth A and R are true and R is the correct explanation of A
BBoth A and R are true but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true
4
Medium
If x = 0.235235235..., then x is equal to:
A235/999
B235/1000
C235/990
D47/200
5
Easy
The prime factorisation of \(2100\) is:
A\(2^{2} \times 3 \times 5 \times 7\)
B\(2^{2} \times 3 \times 5^{2} \times 7\)
C\(2 \times 3^{2} \times 5^{2} \times 7\)
D\(2^{3} \times 3 \times 5 \times 7\)
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